For information about limits on the number of inline policies that you can embed in
a group, see Limitations
on IAM Entities in the IAM User Guide.

Because policy documents can be large, you should use POST rather than GET when calling
PutGroupPolicy. For general information about using the Query API with
IAM, go to Making
Query Requests in the IAM User Guide.

Note:

For .NET Core, PCL and Unity this operation is only available in asynchronous form. Please refer to PutGroupPolicyAsync.